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Telescopes > Celestron > Celestron Schmidt-Cassegrain telescope SC 235/2350 EdgeHD 925 CGE Pro GoTo
Product no.: 54582

Schmidt-Cassegrain telescope SC 235/2350 EdgeHD 925 CGE Pro GoTo

$ 9,800.00 incl. VAT, plus shipping costs
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Product description

The Celestron EdgeHD telescope: Corrected image - sharp right up to the edges!

EdgeHD is the name for Celestron’s “aplanatic Schmidt Cassegrain telescope”. After over 50 years of success, Celestron has revolutionised the classic Schmidt Cassegrain telescope.

EdgeHD telescopes ( "Edge High Definition") are true astrographs. This optical system delivers distortion-free, sharp images right to the edge of the visual field. This means that not only the coma outwith the optical axis is corrected, as is the case in currently available “coma-free” lens designs, but also field curvature.

Lots of optical systems are advertised as “astrographs”. As desired, they display stars with pin-sharp clarity, but along a curved image plane. Photographing this using a camera results in a noticeable image field curvature which rises towards the edge of the image field, resulting in increasing star size and aberations with larger sensors. The stars at the edge expand into small rings (“doughnuts”). As well as the coma, the Celestron Edge HD telescopes correct field curvature right up to the edge of the image. This also significantly improves resolution and magnitude limits in comparison to rival optical systems.

The XLT multi-coating helps to give the EdgeHD scopes a significant performance boost compared to similar systems on the market.

The Edge HD telescopes’ mechanisms and lens tube have been fully overhauled:

  • mirror clamps hold the primary mirror securely in any desired position without putting pressure on the optical elements. The image is stable, even during long exposure times.
  • Air vents behind the primary mirror provide fast air exchange so that the lens cools amazingly quickly. Thanks to an air filter system, dust is prevented from entering the lens tube.

In addition to being fully computerized with a database of over 40,000 celestial objects, the New CGE Pro German Equatorial mount has been completely redesign to offer numerous design advantages for the Astrophotographer:

  • Increased Payload Capacity
    Able to hold our 14" SCT telescope more securely as well as larger optical tubes up to a maximum payload of 90lbs.
  • All-Star Polar Alignment
    Choose any bright alignment star for a software assisted alignment of the mounts polar axis that will have you ready for imaging even if you can't see the North Star.
  • No-Tool polar alignment
    Larger hand knobs for both Altitude and Azimuth adjustments.
  • Meridian Tracking
    Extended tracking past the Meridian of up to 20 degrees of uninterrupted imaging through the best part of the sky.
  • Faster slew speed
    Improved gearing and motors provide faster slew speeds than ever before with a maximum slew rate of over 5°/per second.
  • Power Management
    Redesigned electronics deliver constant regulated power to the motors making them capable of driving the telescope even when not perfectly balanced. This allows the CGE Pro to have the payload capacity of that of much larger (and expensive) mounts without sacrificing smooth tracking motion and pointing accuracy across the entire sky.
  • Accuracy
    The hallmark of any telescope mount is its ability to find, center and track celestial objects with the highest degree of accuracy.
  • Pointing
    With just a standard hand control alignment, CGE Pro has the ability to center a star in your eyepiece or ccd chip to within 5 arc minutes. Using NexStar's advanced pointing features such as Calibration Stars, Sync and Precise GoTo, further improves the pointing accuracy to as low as 1 arc minute in the desired region of the sky.
  • Tracking
    With larger .75" pitch diameter worm, precision made cut-steel gears in gearboxes, and seven slot skewed armature motors the CGE Pro delivers typical tracking performance of +-9 arc seconds, which can be further reduced with the mounts permanent periodic error correction (PPEC).
  • Mount Modeling
    Celestron's NexStar hand control has built-in mount modeling features essential for accurately placing small objects on the center of your ccd chip or high power eyepiece. Aligning on multiple Calibration Stars creates a mathematical model of the opto-mechanical inaccuracies inherent in all equatorial mounts. This model is stored within the hand control and is used to compensate for these inaccuracies thus improving your pointing precision each time you slew your telescope.
  • Portability
    Set up and transportation of the CGE Pro telescopes is made easy by separating the mount into smaller, easy-to-carry components. Unlike fork arm mounted telescopes, the CGE's optical tubes can be quickly removed from their mounts making even the CGE Pro1400 easily assembled in minutes.
  • Stability
    Recognized for superior stability, German Equatorial mounts place the center of gravity directly over the tripod legs and can be easily polar aligned without the use of an optional equatorial wedge. This proven design reduces the "tuning fork" vibration that can be associated with undersized fork mounts. An improved Super HD Tripod supports the CGE Pro mount. This fully extendable tripod is made from the finest 2.75" stainless steel and can be raised to a height of 55". The tripod uses a dual leg support for maximum rigidity with an upper leg brace to provide an outward preload and a lower leg brace providing inward tension.
  • Balance
    CGE Pro equatorial mounts can easily be balanced in both axes. Simply sliding the counterweight for Right Ascension and moving the optical tube along its dovetail mounting for Declination accomplish balancing the weight of camera equipment and other visual accessories. This means that no additional weight needs to be added to balance the telescope when additional accessories are added.
  • Clearance
    CGE Pro mounts support their tubes at a single contact point allowing the tube to move freely around its polar axis without making contact with the telescope's mount. Software features allow the user to set the mounts slew limits to guaranty safe motion. This is particularly useful when adding photographic and CCD instruments that extend from the rear of the telescopes.

All CGE mounted telescopes are compatible with Celestron's CN-16 GPS accessory. Combine the GPS and built-in real time clock and these telescopes will keep track and remember their exact location and time without having to enter the information into the hand control.

It not only matters which telescope you buy but also where you buy it. Our additional services:

  • We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
  • We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.
  • We also provide an edition of the exciting astronomy magazine, “Sterne und Weltraum” with each telescope.

Specifications

Optics


Type
Reflector
Type of build
EdgeHD-Cassegrain
Aperture (mm)
235
Focal length (mm)
2350
Aperture ratio (f/)
10
Resolving capacity
0,49
Light gathering capacity
1127
Max. useful magnification
470
Tube length (mm)
559
Tube weight (kg)
9,5

Reflector


Secondary mirror obstruction
36
Secondary mirror diameter (mm)
85
Ventilation for central mirror
yes
Adjustable
yes

Focuser


Type of build
SC thread
Connection ( to eyepiece)
2

Mount


GoTo control
yes
Mounting type
Equatorial
Type of build
CGE Pro
Tracking speed
5,5 - 2 - 0,5
Tracking speed
64 - 16 - 8 - 4 - 1 - 0,5
Power consumption (mA)
2500
Power supply
12
Load capacity (kg)
40
Cable-guide
external
Internal clock
yes
Mounting saddle
Losmandy-Style
Polar elevation setting (°)
10 - 65
Weight (kg)
34

GoTo control


Alignment method
Auto, 2-Star, 1-Star, Fast, Last Alignment, Hibernate, Solar System
Database
40.000
GPS
optional
Hand Controller
NexStar
Tracking modes
parallactic - North-South
Tracking speeds
sideral, solar and lunar
Interfaces
AutoGuider, Aux, RS232
Software
NexStar
WIFI
no
GoTo Language
German, English, French, Spanish, Italian

Tripod


Type
Tripod
Material
Steel
Weight (kg)
23,6
Tripod leg diameter (mm)
70
Accessory plate
yes
Canibelle
yes

Included accessories


2'' eyepieces
Axiom LX 23mm
Finder scope
9x50
Deviating optics
2", 90° star diagonal
Eyepiece adaptor
1,25" & 2"
Software
NexRemote

General


Special recommendation
yes
Total weight (kg)
87

Area of application


Nature Observation
no
Moon & Planets
yes
Nebulae & galaxies
yes
Astrophotography
yes (very good)
Sun
no (Only with appropriate Sun filter)

Recommended for


Beginners
no
Advanced
yes

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*All prices include VAT plus shipping costs.

Celestron Schmidt-Cassegrain telescope SC 235/2350 EdgeHD 925 CGE Pro GoTo
Included accessories

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